Оцінювання невизначеності вимірювання під час калібрування витратомірів диференціального тиску

Abstract

The procedure for estimating measurement uncertainty during calibration of differential pressure flowmeters is considered. A measurement model is defined that takes into account the correction factors of zero error, measurement convergence, reading variation, temperature deviation at the calibration site from the normalized one, as well as the drift of the working standard pressure value since its last calibration. The calculation of the relative total standard uncertainty and the relative expanded uncertainty is carried out taking into account the contribution of all the components of the uncertainty. A calculated measurement uncertainty budget.